Saving my own function to be used as MATLAB built-in functions

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Saeid
Saeid 2018-4-26
评论： Saeid 2018-4-27
I would like to write a function that can be called from anywhere regardless of my current working path, just like I use integral(...) or sin(...). How should I change the setup to be able to do this?

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Ahmet Cecen
Ahmet Cecen 2018-4-26
编辑：Ahmet Cecen 2018-4-26
Create a startup.m file in your MATLAB user folder(usually Documents/MATLAB) then use addpath in that file.
MATLAB will execute that file everytime it starts up, meaning the paths you specify in that file will be "permenantly" available in any folder for all intents and purposes. (At least for all cases someone asking this question will likely encounter.)

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the cyclist
the cyclist 2018-4-26
编辑：the cyclist 2018-4-26
One way is to put any such functions into a particular directory (e.g. "utilities"), and then add that directory to the search path using the addpath command. I put the addpath command in my startup.m file, so it gets called every time I start MATLAB.
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Jan
Jan 2018-4-27
A correct usage of savepath is:
addpath('D:\Documents\MATLAB\Examples', '-end');
savepath
Then the path is saved to the matlabroot folder, but this requires admin privilegs. Therefore it might be better to follow the advice given in the warning message: save the pathdef.m file to your startup folder - the folder which is active initially.
It is not clear, why the saving failed in your case. Is the folder existing and do you have write privileges?

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